Two collectors calculators National Semiconductor-Texas inst.tx-30x15 - $15 (Minneapolis)

Two collectors calculators National Semiconductor-Texas inst.tx-30x15 1 thumbnail

condition: good

QR Code Link to This Post

Two early calculators one is a Texas Instruments model TX-30x-15 and the other is National Semiconductor model 4640 serial number 124979 both work. show contact info

post id: 7882788858

posted: 2025-09-19 18:18

♥ best of ^[?]

reading

writing

saving

searching

refresh the page.

Two collectors calculators National Semiconductor-Texas...

Two early calculators one is a Texas Instruments model TX-30x-15 and the other is National Semiconductor model 4640 serial number 124979 both work.